Swiss silver chronometer watch with power reserve Circa 1965

Silver open faced deck chronometer by Zenith
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A rare and unusual Swiss silver open faced two day deck chronometer with power reserve and Glucydur balance, circa 1965. Nickel finished lever movement, 19 jewels, Glucydur balance. Silver cuvette. White enamel dial, Roman numerals, fan shaped 48 hour power reserve display and subsidiary seconds. Engine turned case. Case, dial and movement signed.
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Diameter: 60 mm
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Signed: Chronomètre Zenith